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SSC: Experimental support for 6551's DTR via -dtr or -dtr-invert args (#386)

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This commit is contained in:
tomcw 2017-03-18 13:56:18 +00:00
parent 5470febbf8
commit 6063d8e96f
3 changed files with 31 additions and 4 deletions
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8
source/Applewin.cpp
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@ -1034,6 +1034,14 @@ int APIENTRY WinMain(HINSTANCE passinstance, HINSTANCE, LPSTR lpCmdLine, int)
{
g_bMultiMon = true;
}
else if (strcmp(lpCmdLine, "-dtr") == 0) // GH#386
{
sg_SSC.SupportDTR(true, false);
}
else if (strcmp(lpCmdLine, "-dtr-invert") == 0) // GH#386
{
sg_SSC.SupportDTR(true, true);
}
else // unsupported
{
LogFileOutput("Unsupported arg: %s\n", lpCmdLine);

21
source/SerialComms.cpp
View File

@ -74,7 +74,9 @@ SSC_DIPSW CSuperSerialCard::m_DIPSWDefault =
CSuperSerialCard::CSuperSerialCard() :
m_aySerialPortChoices(NULL),
m_uTCPChoiceItemIdx(0),
m_uSlot(0)
m_uSlot(0),
m_bCfgSupportDTR(false), // GH#386 - don't support by default until we have confirmed it works
m_bCfgInvertDTR(false)
{
memset(m_ayCurrentSerialPortName, 0, sizeof(m_ayCurrentSerialPortName));
m_dwSerialPortItem = 0;
@ -111,6 +113,8 @@ void CSuperSerialCard::InternalReset()
m_qComSerialBuffer[0].clear();
m_qComSerialBuffer[1].clear();
m_qTcpSerialBuffer.clear();
m_uDTR = DTR_CONTROL_DISABLE;
}
CSuperSerialCard::~CSuperSerialCard()
@ -212,6 +216,7 @@ void CSuperSerialCard::UpdateCommState()
dcb.ByteSize = m_uByteSize;
dcb.Parity = m_uParity;
dcb.StopBits = m_uStopBits;
dcb.fDtrControl = m_uDTR;
SetCommState(m_hCommHandle,&dcb);
}
@ -511,10 +516,18 @@ BYTE __stdcall CSuperSerialCard::CommCommand(WORD, WORD, BYTE write, BYTE value,
// interrupt request disable [0=enable receiver interrupts] - NOTE: SSC docs get this wrong!
m_bRxIrqEnabled = ((m_uCommandByte & 0x02) == 0);
if (m_uCommandByte & 0x01) // Data Terminal Ready (DTR) setting [0=set DTR high (indicates 'not ready')]
if (m_bCfgSupportDTR) // GH#386
{
// Note that, although the DTR is generally not used in the SSC (it may actually not
// be connected!), it must be set to 'low' in order for the 6551 to function correctly.
// Legacy comment - inaccurate? (see docs\SSC Memory Locations for Programmers.txt)
// . Note that, although the DTR is generally not used in the SSC (it may actually not be connected!),
// it must be set to 'low' in order for the 6551 to function correctly.
// Data Terminal Ready (DTR) setting [0=set DTR high (indicates 'not ready')]
const bool bDTR_Ready = (m_uCommandByte & 0x01) ? true : false;
if (bDTR_Ready)
m_uDTR = !m_bCfgInvertDTR ? DTR_CONTROL_ENABLE : DTR_CONTROL_DISABLE;
else
m_uDTR = !m_bCfgInvertDTR ? DTR_CONTROL_DISABLE : DTR_CONTROL_ENABLE;
}
UpdateCommState();

6
source/SerialComms.h
View File

@ -43,6 +43,7 @@ public:
char* GetSerialPortName() { return m_ayCurrentSerialPortName; }
void SetSerialPortName(const char* pSerialPortName);
bool IsActive() { return (m_hCommHandle != INVALID_HANDLE_VALUE) || (m_hCommListenSocket != INVALID_SOCKET); }
void SupportDTR(bool bEnable, bool bInvert) { m_bCfgSupportDTR = bEnable; m_bCfgInvertDTR = bInvert; }
void CommTcpSerialAccept();
void CommTcpSerialReceive();
@ -139,4 +140,9 @@ private:
BYTE* m_pExpansionRom;
UINT m_uSlot;
// DTR
UINT m_uDTR;
bool m_bCfgSupportDTR;
bool m_bCfgInvertDTR;
};